Hello everyone. I need help with a couple of questions. I can\'tseem to get the

Question

Hello everyone. I need help with a couple of questions.   I can'tseem to get the answer right, no matter what I do!   I amjust unable to figure this out.   Please help me ifsomeone is able.   Thanks in advance if someonecan!!   :-) A piece of aluminum (specific heat 0.910 kJ/kg0C) of mass 115 g at 77 0 C is droppedinto a Styrofoam cup filled with 183 ml water at 200 C. What are the final temperatures of the water andthe aluminum?    (4.19 kJ/kgoC = specificheat of water.) You baked two cakes: one in a light aluminum pan and one in aheavy pyrex pan. Which pan needs to give up the most heat energy to cooldown to room temperature? Which pan gives up the heat energy the fastest? Which pan is most likely to burn your fingers if you tryto move it too soon? Which pan is most likely to brown the bottom of thecake? (same temperature oven, same time in oven.) Hello everyone. I need help with a couple of questions.   I can'tseem to get the answer right, no matter what I do!   I amjust unable to figure this out.   Please help me ifsomeone is able.   Thanks in advance if someonecan!!   :-) A piece of aluminum (specific heat 0.910 kJ/kg0C) of mass 115 g at 77 0 C is droppedinto a Styrofoam cup filled with 183 ml water at 200 C. What are the final temperatures of the water andthe aluminum?    (4.19 kJ/kgoC = specificheat of water.) You baked two cakes: one in a light aluminum pan and one in aheavy pyrex pan. Which pan needs to give up the most heat energy to cooldown to room temperature? Which pan gives up the heat energy the fastest? Which pan is most likely to burn your fingers if you tryto move it too soon? Which pan is most likely to brown the bottom of thecake? (same temperature oven, same time in oven.) Which pan needs to give up the most heat energy to cooldown to room temperature? Which pan gives up the heat energy the fastest? Which pan is most likely to burn your fingers if you tryto move it too soon? Which pan is most likely to brown the bottom of thecake? (same temperature oven, same time in oven.)

Explanation / Answer

A piece of aluminum (specific heat 0.910 kJ/kg0C) of mass 115 g at 77 0 C is droppedinto a Styrofoam cup filled with 183 ml water at 200 C. What are the final temperatures of the water andthe aluminum?    (4.19 kJ/kgoC = specificheat of water.)

heat lost by aluminium=115*10-3*910*(77-t)....(.1) [ lett be the final temperature]
heat gained by water=183*10-3*4190*(t-20)......(2)
as heat lost =heat gained solving 1 and 2 we will get theanswer.which is the final temperature.

You baked two cakes: one in a light aluminum pan and one in aheavy pyrex pan.

Which pan needs to give up the most heat energy to cooldown to room temperature?
both

Which pan gives up the heat energy the fastest?
aluminium pan

Which pan is most likely to burn your fingers if you tryto move it too soon?
aluminium pan

Which pan is most likely to brown the bottom of thecake? (same temperature oven, same time in oven.)
aluminium pan

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